Abstract: In this paper, the layout design of plain system for LPG storage/distribution station has been established according to the principle of system layout design. The design procedure is that the interrelationship diagram, spatial relation diagram, and layout, scenario diagram are successively mapped in accordance with the requirement of gas storage and distribution in the light of the process demand of the station, and then the scenarios are put into comparision, and the optimized general drawing of plain design will be finally determined.